Fortran 90 offers features such as dense matrix and vector operations,
automatic memory allocation, operator overloading, optional parameters
and more. Fortran 90 also includes all of Fortran77. With these features,
programming in Fortran 90 can be made much simpler than in Fortran 77 (or
C or C++) while retaining investments done in old Fortran 77 programs.
For more information on Fortran 90, click
here or at the F90 FAQ
. An on-line course on Fortran
90 is also available. A comprehensive repository on fortran can be
found at www.fortran.com/fortran
. Also see a page by
Ian Chivers and Jane Sleightholme .
Classes in Fortran 90
One of the sources of complexity in efficient programming is programming
sparse matrix operations. I am writing a module SPARSEM
in Fortran 90 where such programming can be greatly simplified. Please
see examples .
SPARSEM includes FSPAK90, an interface to FSPAK,
where all memory allocation is automatic and the number of parameters is
reduced to absolute minimum.
SPARSEM and associated programs are under active development.
They are available via anonymous FTP at nce.ads.uga.edu
in directory BLUPF90.
Compilers in Fortran 90
While programming F90 , I tried various compilers on various platforms.
Many of them had problems. A good compiler is not necessarily the one that
has the fewer problems but the one where help is available. An interesting
of compilers was done for a study on the use of f90 as an object-oriented
language. My experiences are summarized here.
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